The module category list is loaded from the file server/openerp/addons/base/module/module_data.xml.

You can also see it querying the ir_module_category Postgres table. This is what I found:seq name=== ================================1 Customer Relationship Management2 Sales Management3 Project Management4 Knowledge Management5 Warehouse Management6 Manufacturing7 Invoicing & Payments8 Accounting & Finance9 Purchase Management10 Human Resources11 Extra Tools12 Marketing13 Point of Sale14 Advanced ReportingIf I can help you a little, I'll be happy